Manually operated dry shaving device



Aug. 28, 1951 Q F. WJKNOWLES 2,566,214

MANUALLY OPERATED DRY SHAVING DEV ICE Filed Aug. 13, I947 H i 7ATTORNEY carrier. H.

Patented Aug. 28, 1951 MANUALLY OPERATED DRY SHAVING DEVICE .ErederickWilfred Knowles, London, England, as- .signor to The Wilkinson Sword Company Limited, LondomfEngland, aiBritish company,

Application. August '13, 1947, Serial No. 768,353 In Great Britain September 25, 1946 8 Claims. 1

This invention, relates to manually operated dry shaving devices comprising. a cutter device carried on an operating. handleqwhich is operativelyconnected through aball joint with a support for a reticulated guard plate.

Theobject of the present invention is to provide a manuallyuoperated dry shaver of the kind referred to in which the parts are of simple and cheap construction and which will be reliable and eflicient in operation.

In the accompanying drawings which illustrate one form of manually operated dry shaving device made according. to the invention.

Fig. 1 isa vertical. section through the device;

Fig. 2 is a sectional planview taken on line 2-2, Fig. 1;

Fig. 3 is a sectional plan view taken on line 3-3, Fig. l, and i Fig. 4 is a vertical section through the cutter.

The device shown in the drawings comprises a handle ID, a guard carrier H, and a cutter blade I2 mounted on a spindle l3 which also serves operatively to connect the handle and .guard carrier.

The handle I is moulded from a synthetic resin and comprises a rounded end, which is solid except for anaxial bore "1 and a flared skirt port-ion I0 terminating at top in a spherical recess I 0 The guard carrier H is made of brass and, in addition to an outer conicalportion l-l, terminating in a cylindrical portion H it comprises an inner elongated tapering portion I I terminating in a spherical end I I apertured at I 5 and housed in the recess I0 The inclination of the and soldered ina circular bezel I9 made of mild spring steel and adapted to be sprung into posi tion on the cylindrical portion H of the guard Instead of being planar the uard plate .lx'l may be inwardly curved, or dished, i. e. convex on the side facing the spherical end. H Thezspindle I3 is made of steel and is provided with two intermediate parts I3 I3 of different diameters. axially dr'llled steel ball [4 is mounted on the part l3 andis supported on a shoulder 20 formed .betweentheparts 13 I3 handle.

2 The ball is located nearer to. the handle than to the cutter thus providing a long radius of oscillation or gy-rationto. the cutter.

As shown in detail .in Fig. 4 the cutter l2 cornprises. a cylindrical hub, 21. having an inwardly curved or hyperboloidal axial drill ,22 therein. and a conical skirt 23-. The apex angle of the inner wall of the skirt is 144 and the apex angle cf the outer wall of the. skirt is 10.83, the angle 0. formed between the inner and outer walls bein thus 18.

The outer edge .24 of the, cutter is suitably sharpened and. is pressed intocontact with the inner surface of the guard plate H. by means of a spring 25 bearing between a shoulder 26, on the sprindle l3 and the. cylindrical hub. 21. of the cutter l2. s

The parts arev assembled by Placing the ball 14 on the part 43 of the spindle, aligning the handle In, [0 and guard carrier ll. ll. (the latter without the guard plate) inserting the spindle 13 through, the aligned aperture l5 and bore [0 andsecuring the-end of the spindle (p o.- vided with screw threadil) by .a nut 28. located in a corresponding recess 29 in the. GOD of the The device is now inverted, first the p ing 25 and then the cu er l2 placed on the spindle, and finally the bezel l9 containing the reticulated guard plate I] is snapped on to. the cylindrical end [I of the guard carrier.

The device is then ready for use.

Itwill benoted that in the arrangement described the ball [4. provides a universal move,- ment. between the handle ll] and the guard carrier H, within limits determined by the size of the aperture [5 in the guard carrier and by the difference in inclination between the Walls. Of the elongated part H of of the. guard carrier and of theskirt portion in of the handle. Morev r. the inward curvature of the drill 2 in the cutter allows Of tiltin of the. cutter 1.2, in addi- .tion to movement of the cutter toward and. away from the ball 14. Thus the. cutting edge can. b maintained in continuous con c withthe inner surface of the guard. plate during a y movement of the ball joint. The cutter i2 is preferably of a resilient nature to allqw the cu tin e ge 11 adapt itself to any inaccuracies. and h ng s. of

form of the shield.

In use, the guard plate I! is pressed on to the the surface to be shaved and a circular, spiral, or reciprocating m'ovementis applied to the handle, whereupon the ball joint permits the guard plate I! to roll, .eircumgyrate, circumvolve and rock over the surface .tcjbc Shaved. During such 1. A manually operated dry shaving devicecomprising, in combination, an operating handle,

a spindle fixed axially to, and extending beyond said handle, a support for a reticulated guard plate, said handle having ,a spherical socket" formed therein, said support having one end] thereof formed into a hollow substantially spherical shape adapted to be received in said spherical 4. A manually operated dry shaving device comprising, in combination, an operating handle, a spindle extending axially through and beyond said handle, the central part of the spindle being formed with an enlarged diameter the ends of which constitute two seats, a support for a reticulated guard plate, said support having an aperture through which said spindle passes, means comprising spherical surfaces on said support and said handle and a ball located on one of said seats on said spindle, said ball being adapted to engage theinner spherical surface of said support, whereby universal movement is provided between said handle and said support, a reticulated guard plate mounted on said support at the'end thereof remote from the ball joint, said socket, means comprising a ball located on said spindle and adapted to be received in said hollow substantially spherical end of said support} whereby universal movement is provided between said handle and'said support, a reticulated guard plate mounted on said support at the end thereof remote from the ball joint, said guard plate being substantially planar and a cutter device mounted on said spindle at the end thereof remote from the handle so as to cooperate with the inner surface of said guard plate,lsaid ball being located nearer to the handle than to the cutter.

2. A manually operated dry shaving device comprising, in combination, an operating handle, a spindle extending axially through and beyond said handle, aseat on said spindle, a sup- ,port for a reticulated guard plate, said handle having a spherical socket formed therein, said a reticulated guard plate mounted on said supportat the end thereof remote from the ball joint, said guard plate being substantially planar, and a cutter device mounted on said spindle at the end thereof remotefrom the handle sov as to cooperate with the inner surface of said guard plate, said ball being located nearer to the handle than to the cutter.

,3. A manually operated dry shaving, device comprising, in combination, an operating handle, comprising a solid end and ahollow skirt portion terminating in a spherical recess, ,aspindle extending axially through and beyond said handle, a seat onsaid spindle, a'support for a reticulated guard plate, an extension to said support project- ,ing into the skirt portion of said, handle and having an apertured spherical end throughwhich ,said spindle passes, means comprising a ball lo- ,cated on said seat on said spindle for operatively connecting said handle to said support, the spherical end of said extension to said support being retained between the ball and said spherical recess in the handle, whereby universal move- -ment is provided between said handle and said support, a reticulated guardplate mounted on .said support at the end thereof remote from the ball joint, said guard plate being substantially planar, and a cutter device mounted on said spindle at the end thereof remote from the hanfldle so as to cooperate with the inner surface of said guard plate, said ball being located nearer to the solid end of the handle than to the cutter.

guard plate being substantially planar, a cutter device mounted on said spindle at the end thereof remote from the handle so as to cooperate with the inner surface of said, guard plate, saidball being located nearer to the handle than to the cutter, and spring means for pressing said cutter device on to said guardplate, one end of said spring means bearing against the other of said seats on said spindle.

5. A manually operated dry shaving device according to claim 3 wherein the wall of said skirt portion of said handle and the wall of said extension to said support are outwardly inclined, the angle of inclination of said extension being smaller than the angle of inclination of the skirt.

6. A manually operated dry shaving device comprising, in combination, an operating handle, a spindle fixed axially to, and extending beyond said handle, a support for areticulated guard plate, means comprising a ball located on said spindle and engaging a socket shaped surface of said support for operatively connecting said handle to said support, whereby universal movement is provided between 'said handle and said support, a reticulated guard plate mounted on said support at the end thereof remote from the ball joint, said guard plate being substantially planar, and a cutter device comprising a cylindrical hub mounted on said spindle at the end thereof remote from the handle so as to cooperate with the inner 'surface of said guard plate, said ball being located nearer to the handle than to the cutter.

7. A manually operated dry shaving device according to claim 6 wherein said cutter device comprises a conical skirt depending from said cylindrical hub, the outer edge of said conical skirt being sharpened to constitute a cutting edge. 8. A manually operated dry shaving device according to claim 6 wherein said cylindrical hub is axially drilled with an inward (hyperboloidal) curvature to permit of tilting on the spindle.

FREDERICK WILFRED KNOWLES.

REFERENCES CITED The following references' are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 166,954 Woodward Aug. 24, 1875 241,178 Amazeen May 10, 1881 407,671 Leland July 23, 1889 2,242,458 Dessonnaz May 20, 1941 FOREIGN PATENTS Number Country Date 558,703 Great Britain Jan. 17, 1944 

